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The skyscraper at New York's World Trade Center has been designated the tallest building in the United States by virtue of its spire, surpassing Chicago's Willis Tower, an international body said......

Seventy-five years after it opened its doors, the Empire State Building looms large -- and not just on the Manhattan skyline. In many minds, it remains the ultimate skyscraper, though it has been......

World's tallest buildings Which is the world's tallest building?Take the rediff business quiz and see how much you know about some of the tallest buildings of the world Biz Quiz is best viewed in......